WorksheetsC1.3 Chemical Reactions / C1.4 Acids & Alkalis
Total questions: 100
Worksheet time: 33mins
Name
Class
Date
1.
Which of these is a chemical reaction?
a)
Filtering sand and water
b)
Cooking an egg
c)
Water evaporating
d)
Mixing baking ingredients
2.
Which of these contains only chemical reactions?
a)
Rusting, burning, baking
b)
Rusting, burning, melting
c)
Burning, Melting, Freezing
d)
Cutting, Rusting, Baking
3.
Which statement is true of chemical reactions?
a)
Do not make new substances
b)
Create new reactants
c)
Involve changes of state
d)
Usually irreversible
4.
Which of these is a physical reaction?
a)
Burning wood on a fire
b)
Baking a cake
c)
Digesting food
d)
Dissolving sugar in water
5.
Which statement is true of physical reactions?
a)
Usually irreversible
b)
Reactants get used up
c)
Create new products
d)
Involve changes of state
6.
What is rearranged in chemical reactions?
a)
Protons
b)
Atoms
c)
States
d)
Boiling Points
7.
What are substances present at the start of a chemical reaction called?
a)
Reactates
b)
Reactoids
c)
Reactants
d)
Reactives
8.
What are the substances that are made in a chemical reaction called?
a)
Resultants
b)
Products
c)
Presents
d)
Outcomes
9.
Which of the following is not a way we can tell a chemical reaction may be happening?
a)
Gets warmer
b)
Fizzes
c)
Changes state
d)
Changes colour
10.
What can be used to speed up a chemical reaction?
a)
Actalyst
b)
Dogalyst
c)
Catalyst
d)
Analyst
11.
What is found on the left of a chemical equation?
a)
Products
b)
Equals sign
c)
Reactants
d)
Both reactants and products
12.
What is found on the right of a chemical equation?
a)
States of matter
b)
Products
c)
Equals sign
d)
Reactants
13.
What links the reactants and products in a chemical equations
a)
Arrow
b)
Single line
c)
Dashed line
d)
Equals sign
14.
Magnesium burns in oxygen to form magnesium oxide. What are the reactants?
a)
Magnesium Oxide
b)
Magnesium Oxide & Oxygen
c)
Magnesium only
d)
Magnesium & oxygen
15.
Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen. What are the products?
a)
Magnesium chloride & hydrogen
b)
Magnesium & hydrogen
c)
Magnesium chloride & hydrochloric acid
d)
Magnesium & hydrochloric acid
16.
Zinc reacts with oxygen. What is produced?
a)
Zinc oxide
b)
Zinc metal
c)
Iron oxide
d)
Zinc chloride
17.
What is the equation for copper reacting with oxygen?
a)
Copper + Oxygen = Copper oxide
b)
Copper + Oxygen --> Copper oxide
c)
Copper oxide --> Copper + Oxygen
d)
Copper Oxide = Copper + Oxygen
18.
What is the correct symbol equation for the reaction of iron with oxygen to produce iron oxide?
a)
2Fe + O₂ --> 2FeO
b)
FeO --> Fe + O₂
c)
2Fe + O₂ = 2FeO
d)
Fe + O₂ --> FeO
19.
What is not a reason why we sometimes use symbol equations rather than word equations?
a)
Can see both the reactants & products
b)
Can see the number of atoms and molecules
c)
Understood universally regardless of language
d)
Quicker to write
20.
What is the symbol equation for the reaction of hydrogen with oxygen to produce water?
a)
2H₂ + O₂ --> 2H₂O
b)
2H₂ + 2O₂ --> 2H₂O
c)
2H₂ + O₂ --> H₂O
d)
H₂ + O₂ --> 2H₂O
21.
What is the scientific term for burning?
a)
Neutralisation
b)
Exhalation
c)
Combustion
d)
Respiration
22.
What products are formed after burning a fuel?
a)
Methane & water
b)
Oxygen & water
c)
Carbon dioxide & water
d)
Carbon dioxide & oxygen
23.
Which of these is a fuel?
a)
Water
b)
Carbon dioxide
c)
Methane
d)
Sodium Hydroxide
24.
Which of the following is a non-renewable energy source?
a)
Wind
b)
Hydroelectric
c)
Coal
d)
Solar
25.
What term is given to non-renewable fuels?
a)
Exhaustive fuels
b)
Fossil Fuels
c)
Fast fuels
d)
Prehistoric fuels
26.
What three things are needed for something to burn?
a)
Oxygen, Fuel, Heat
b)
Carbon Dioxide, Fuel, Wood
c)
Gas, Wood, Spark
d)
Heat, Spark, Oxygen
27.
What is bad about non-renewable fuels?
a)
They do not burn very well
b)
The are replenished too quickly
c)
They pollute the environment
d)
They are too expensive
28.
An investigation is done with 3 different fuels. They are burned to heat water for 3 minutes. The temperature change is recorded. What is the independent variable?
a)
Type of fuel
b)
Volume of water heated
c)
Time water heated for
d)
Temperature change
29.
An investigation is done with 3 different fuels. They are burned to heat water for 3 minutes. The temperature change is recorded. What is the dependent variable?
a)
Temperature change
b)
Type of fuel
c)
Volume of water heated
d)
Time water heated for
30.
An investigation is done with 3 different fuels. They are burned to heat water for 3 minutes. The temperature change is recorded. Which of the following is not a control variable?
a)
Volume of water heated
b)
Mass of fuel used
c)
Type of fuel
d)
Time water heated for
31.
What is the name for a reaction where a compound breaks down into simpler compounds or elements?
a)
Neutralisation
b)
Decomposition
c)
Degradation
d)
Physical Reaction
32.
What is the name for a reaction that needs heat to break down a compound into simpler compounds or elements?
a)
Combusting Decomposition
b)
Combusting Degradation
c)
Thermal Decomposition
d)
Thermal Degradation
33.
What is produced when a metal carbonate breaks down with heat?
a)
Metal Oxide + Water
b)
Metal + Water
c)
Metal Oxide + Carbon Dioxide
d)
Metal + Carbon Dioxide
34.
What is the test for the presence of carbon dioxide?
a)
Limewater turns red
b)
Limewater turns cloudy
c)
Limewater turns clear
d)
Limewater evaporates
35.
What are the products when zinc carbonate breaks down with heat?
a)
Zinc Oxide + Water
b)
Zinc Dioxide + Water
c)
Zinc Dioxide + Carbon
d)
Zinc Oxide + Carbon Dioxide
36.
If the products after heating are calcium oxide and carbon dioxide, what was the reactant?
a)
Carbon & Calcium
b)
Calcium Dioxide
c)
Calcium carbonate
d)
Calcium & Water
37.
What is an anomalous result?
a)
A result that does not fit the pattern
b)
The overall average of the trials
c)
A result that has no repeats
d)
A result that exactly matches another trial
38.
How are anomalous results dealt with?
a)
Included with other trials in the average calculation
b)
Not used in the average calculation
c)
Multiplied by two before being used in the average calculation
d)
Divided by two before being used in the average calculation
39.
When investigating the time different carbonates take to decompose when heated, what is the dependent variable?
a)
Time (secs)
b)
Type of carbonate
c)
Temperature of Bunsen Burner
d)
Mass of carbonate
40.
When investigating the time different carbonates take to decompose when heated, what type of graph is drawn?
a)
Pie chart
b)
Line graph
c)
Scatter graph
d)
Bar graph
41.
What is true of any chemical reaction?
a)
Mass of reactants can be greater or less than the mass of products
b)
Mass of reactants is equal to mass of products
c)
Mass of reactants is less than the mass of products
d)
Mass of reactants is greater than the mass of products
42.
What happens to atoms in a chemical reaction?
a)
Some atoms are removed
b)
They are rearranged
c)
New atoms are added
d)
They get bigger in size
43.
What word is true of the mass in a chemical reaction?
a)
Enlarged
b)
Decreased
c)
Conserved
d)
Magnified
44.
The mass of magnesium and oxygen in a reaction is 2.4g. What is the mass of magnesium oxide produced?
a)
2.4g
b)
2g
c)
1.2g
d)
4.8g
45.
The mass of hydrogen and oxygen in a reaction is 0.5g. What is the mass of the water produced?
a)
0.5g
b)
5.0g
c)
0.25g
d)
0.5kg
46.
What is the correct symbol equation for the reaction of carbon and oxygen to produce carbon dioxide?
a)
2C + O₂ = CO₂
b)
C + O₂ = CO₂
c)
C + O₂ ---> CO₂
d)
C + O ---> CO₂
47.
2.2g of copper reacts with oxygen. 4g of copper oxide are produced. What was the mass of oxygen?
a)
2.2g
b)
1.8g
c)
4g
d)
6.6g
48.
What is the balanced symbol equation for the reaction between magnesium (Mg) and oxygen (O₂) to produce magnesium oxide (MgO)?
a)
2Mg + O₂ ---> 2MgO
b)
Mg + O₂ ---> 2MgO
c)
Mg + O₂ ---> MgO
d)
Mg + 2O₂ ---> 2MgO
49.
6.8g of hydrogen peroxide breaks down to produce 3.2g of oxygen. What mass of water is also produced?
a)
3.6g
b)
6.4g
c)
10.0g
d)
3.2g
50.
Why does it sometimes appear as if the mass after a reaction has decreased?
a)
The reaction has not completely finished
b)
Gas is given off and escapes
c)
Some reactants in solution may have beceome a solid
d)
None of these
51.
What happens to energy in endothermic reactions?
a)
Transferred in from the surroundings
b)
Transferred out to the surroundings
c)
Transferred to one of the reactants
d)
There is no change
52.
What happens to energy in exothermic reactions?
a)
Transferred in from the surroundings
b)
There is no change
c)
Transferred out to the surroundings
d)
Transferred to one of the reactants
53.
What happens to the temperature of the surroundings in endothermic reactions?
a)
Decreases
b)
Depends on the reactants
c)
Increases
d)
No change
54.
What happens to the temperature of the surroundings in exothermic reactions?
a)
Decreases
b)
Increases
c)
Depends on the reactants
d)
No change
55.
What type of reaction are melting and boiling?
a)
Exothermic
b)
Endothermic
c)
Neither endothermic or exothermic
d)
Both exothermic and endothermic
56.
What type of reaction is combustion?
a)
Exothermic
b)
Neither endothermic or exothermic
c)
Endothermic
d)
Both exothermic and endothermic
57.
How can we tell if a reaction is exothermic or endothermic?
a)
Measure if the temperature is below zero or not
b)
Measure the temperature change of the reaction
c)
Observe if it fizzes
d)
Observe if a solid precipitate forms
58.
What do all chemical reactions involve?
a)
Energy transfers
b)
Colour changes
c)
Changes of state
d)
Fizzing
59.
A student measures an initial temperature of 22°C. At the end of the reaction the temperature is 34°C. What is the temperature change and is the reaction endo or exothermic?
a)
-12°C; Endothermic
b)
-12°C; Exothermic
c)
+12°C; Endothermic
d)
+12°C; Exothermic
60.
A student measures an initial temperature of 15°C. At the end of the reaction the temperature is -20°C. What is the temperature change and is the reaction endo or exothermic?
a)
-35°C; Endothermic
b)
-35°C; Exothermic
c)
+35°C; Exothermic
d)
+35°C; Endothermic
61.
Which of these is an acid?
a)
Soap
b)
Baking Soda
c)
Vinegar
d)
Toothpaste
62.
Which of these is an alkali?
a)
Coca-cola
b)
Lemon Juice
c)
Vinegar
d)
Soap
63.
Which acid is found in the stomach?
a)
Hydrochloric Acid
b)
Citric Acid
c)
Nitric Acid
d)
Sulphuric Acid
64.
What do all acids contain?
a)
Carbon
b)
Oxygen
c)
Nitrogen
d)
Hydrogen
65.
What word describes the harmful effect of strong acids and alkalis?
a)
Biohazard
b)
Irritant
c)
Corrosive
d)
Explosive
66.
What phrase describes alkalis?
a)
All are bases
b)
Contain hydrogen ions
c)
React with bases
d)
Taste sour
67.
What word describes an acid that is dissolved in a lot of water?
a)
Decomposed
b)
Diluted
c)
Reacted
d)
Concentrated
68.
What makes an acid or alkali harmful?
a)
Its concentration only
b)
Neither its strength or its concentration
c)
Its strength only
d)
Its strength and concentration
69.
How could you tell if one acid was stronger than another?
a)
Observe how they taste
b)
Observe how they feel on your skin
c)
Observe how they mix with water
d)
Observe how it reacts with a metal
70.
What safety precautions should you take when using acids and alkalis at school?
a)
Follow the teachers instructions carefully
b)
Wear goggles
c)
Be careful when pouring solutions
d)
All of these
71.
What name is given to a substance that changes colour in acidic or alkaline solutions?
a)
Metal carbonate
b)
Sodium hydroxide
c)
Indicator
d)
Initiator
72.
What colour does blue litmus turn in an acid?
a)
Yellow
b)
Red
c)
Remains blue
d)
Pink
73.
What type of litmus paper would be used to tell if a solution was alkaline?
a)
Green litmus paper
b)
Yellow litmus paper
c)
Red litmus paper
d)
Blue litmus paper
74.
What is the range of the pH scale?
a)
0-14
b)
0-12
c)
0-10
d)
0-7
75.
What pH is neutral?
a)
pH7
b)
pH10
c)
pH0
d)
pH6
76.
Which of these pHs is the strongest acid?
a)
pH7
b)
pH2
c)
pH5
d)
pH12
77.
Which is the pHs is the strongest alkali?
a)
pH13
b)
pH7
c)
pH12
d)
pH9
78.
Which of these is an indicator that can be used to determine the strength of an acid?
a)
None of these
b)
Blue litmus paper
c)
Universal Indicator solution
d)
Red litmus paper
79.
Sodium hydroxide is a strong alkali. It is added to a large volume of water. Which statement is true about the solution we now have?
a)
It is a strong but dilute alkali
b)
It is a strong and concentrated alkali
c)
It is safe to drink
d)
It is a weak and dilute alkali
80.
Which of the following most likely has a pH of 1?
a)
Citric Acid
b)
Battery Acid
c)
Bee sting
d)
Milk
81.
What is the name of the reaction that occurs when an acid and an alkali react?
a)
Decomposition
b)
Oxidation
c)
Neutralisation
d)
Physical Reaction
82.
Which of these is not a base?
a)
Metal Carbonate
b)
Metal Hydroxide
c)
Citric Acid
d)
Metal Oxide
83.
When an acid and a base react what is produced?
a)
Salt + Carbon Dioxide
b)
Salt + Water
c)
Salt + Hydrogen
d)
Salt alone
84.
When sulphuric acid reacts with lithium hydroxide what salt is formed?
a)
Lithium hydrate
b)
Hydrogen sulphate
c)
Lithium sulphate
d)
Lithium chloride
85.
Sodium hydroxide reacts with hydrochloric acid to form sodium chloride and water. What is the salt in this reaction?
a)
Water
b)
Sodium hydroxide
c)
Sodium chloride
d)
Hydrochloric acid
86.
A neutralisation reaction produces the salt potassium chloride. What acid was used in the reaction?
a)
Ethanoic Acid
b)
Hydrochloric Acid
c)
Citric Acid
d)
Sulphuric Acid
87.
A neutralisation reaction produces the salt sodium nitrate. What else is also produced?
a)
Nitric Acid
b)
Sodium chloride
c)
Water
d)
Hydrogen
88.
When an acid and base neutralise each other what is the pH of the solution?
a)
pH5
b)
pH7
c)
pH14
d)
pH1
89.
What can be added to acidic soil to make it more suitable to grow crops?
a)
Oxygen
b)
A base
c)
Fertiliser
d)
Water
90.
What can humans take for 'heartburn'?
a)
Antacid tablets
b)
Vinegar
c)
Counselling
d)
Antibiotics
91.
What is formed when an acid reacts with a metal element or metal compound?
a)
Salt
b)
Metal oxide
c)
Base
d)
Alkali
92.
What is produced when an acid reacts with a metal element (e.g. zinc)?
a)
Salt + Oxygen
b)
Salt + Hydrogen
c)
Salt + Carbon Dioxide
d)
Salt + Water
93.
What is produced when an acid reacts with a metal compound (e.g. copper oxide)?
a)
Salt + Water
b)
Salt + Oxygen
c)
Salt + Hydrogen
d)
Salt + Carbon Dioxide
94.
What salt would be formed if hydrochloric acid reacts with sodium hydroxide?
a)
Chlorine
b)
Hydrogen chloride
c)
Sodium chloride
d)
Sodium sulphate
95.
What salt would be formed if sulphuric acid is reacted with copper oxide?
a)
Sulphur dioxide
b)
Copper sulphide
c)
Copper sulphate
d)
Copper chloride
96.
What salt would be formed if nitric acid is reacted with zinc oxide?
a)
Zinc nitrate
b)
Zinc nitrite
c)
Zinc nitride
d)
Zinc oxide
97.
Which of the following describes a salt?
a)
Compound
b)
Atom
c)
Mixture
d)
Element
98.
What is the formula for sulphuric acid?
a)
CuSO₄
b)
HCl
c)
HNO₃
d)
H₂SO₄
99.
What is the formula for sodium chloride?
a)
NaNO₃
b)
Na₂SO₄
c)
HCl
d)
NaCl
100.
When making the salt copper sulphate which is not a step that was taken?
a)
Stir copper oxide into sulphuric acid
b)
Heat gently with a Bunsen burner
c)
Hold the formed crystals in your hand
d)
Filter the solution into an evaporating dish
100 %
